Pedigree Analysis of a Major QTL Conditioning Soybean Resistance to Southern Root‐Knot Nematode

Abstract

parent. Forrest was shown to possess a single additive Mi-resistance gene, Rmi1 (Luzzi et al., 1994). In a cross The southern root-knot nematode [Meloidogyne incognita (Koof PI 96354, which possesses a high level of resistance foid and White) Chitwood] (Mi) is a serious pest of soybean [Glycine max (L.) Merr.] in the southern USA. Many soybean cultivars with to Mi (Luzzi et al., 1987), and 'Bossier' (Mi susceptible), Mi resistance and high productivity have been developed in the USA a major QTL was identified which mapped to LG-O of during the past few decades. DNA markers have been used to identify the public soybean genetic linkage map (Tamulonis et a major quantitative trait locus (QTL) near the top of Linkage Group al., 1997). With SSR markers, Li et al. (2001) found the O (LG-O) conferring resistance to Mi. The objectives of this study major Mi QTL on LG-O was indicated in the Satt492 were to determine the frequency of elite Mi-resistant cultivars that and Satt358 interval and located 3.1 cM from Satt492. inherited the major Mi resistance QTL on LG-O and determine the Tamulonis et al. (1997) speculated, based on segregation ancestral source of the Mi-resistance allele at this QTL. Forty-eight for gall number in a population of Forrest ϫ PI 96354 soybean lines, including ancestral, Mi-susceptible, and Mi-resistant and the level of resistance in Forrest, that the Mi-resisgenotypes were analyzed at six simple sequence repeat (SSR) loci tance QTL on LG-O was the Rmi1 gene.

Evaluation of Soybean Germplasm for Resistance to Multiple Nematode Species: Heterodera glycines, Meloidogyne incognita, and Rotylenchulus reniformis

“…Two minor QTLs were also reported on chromosomes 13 (LG F) and 18 (LG G) (Luzzi et al, 1994;Tamulonis et al, 1997;Pham et al, 2013;Xu et al, 2013;Jiao et al, 2015). Ha et al (2004) analyzed 48 soybean cultivars (MG V-VIII) and concluded that they all carry the Rmi1 gene, which was inherited from the same source of resistance, the ancestral cultivar 'Palmetto' (PI 548480). Luzzi et al (1987) screened 2370 lines of the Southern Germplasm Collection (MG V-VIII) and identified 61 lines carrying resistance to SRKN.…”

Exploring Machine Learning Algorithms to Unveil Genomic Regions Associated With Resistance to Southern Root-Knot Nematode in Soybeans

“…Additional marker-trait associations have been identified on Chrs. 6 in a soybean variety derived from PI 96354 ( Shearin et al, 2009 ), 7 in soybean variety LS5995 ( Fourie et al, 2008 ), 8 in PI 438489B ( Xu et al, 2013 ), 10 in “Palmetto,” LS5995, PI 96354, PI 438489B, PI 567516C, and PI 567305 ( Ha et al, 2004 ; Fourie et al, 2008 ; Pham et al, 2013 ; Xu et al, 2013 ; Passianotto et al, 2017 ; Vuong et al, 2021 ), 13 in PI 438489B, PI 567516C, and PI 567305 ( Xu et al, 2013 ; Jiao et al, 2015 ; Vuong et al, 2021 ), 17 in PI 567516C ( Jiao et al, 2015 ), and 18 in PI 96354 ( Pham et al, 2013 ). The effect of combining these marker-trait associations has not been investigated to date.…”